KR20140124270A - Lighting lens module - Google Patents

Abstract

An object of the present invention is to provide an illumination lens module that reflects light emitted to a side by using a lens and a reflection member to improve the light condensing efficiency. To achieve this object, the present invention provides an illumination lens module, comprising: a first lens portion having an aspherical surface convex on its upper and lower surfaces and having a radius of curvature different from that of the lens surface; and a second lens portion formed on the outer periphery of the first lens portion, A reflection surface for allowing a part of the light incident on the incident surface to be totally reflected and an exit surface for reflecting the light totally reflected by the reflection surface to be emitted by being refracted by the light parallel to the optical axis, A lens body portion having two lens portions; And a reflector spaced a predetermined distance from the outer periphery of the lens body to reflect light emitted to the side without being totally reflected by the reflective surface of the second lens unit with light parallel to the optical axis and emit the light. Accordingly, it is an object of the present invention to improve the light collecting efficiency by the lens, to reduce the size of the illumination apparatus by reducing the size of the lens while improving the light collecting efficiency, Thereby, it is possible to control the angle of diffraction as necessary.

Description

Lighting Lens Module {LIGHTING LENS MODULE}

The present invention relates to an illumination lens module, and more particularly, to an illumination lens module that reflects light emitted to a side by using a lens and a reflection member, thereby improving light collection efficiency.

In general, LEDs have been used mainly as a function of irradiating a wide area or illuminating a close range since the irradiation of the illuminating light, that is, the radiation angle is very large up to now.

Since the LED has a very large radiation angle due to its characteristics, the etendue problem occurs as a role of investigating the local region at a long distance, so that the light can not be efficiently used.

Accordingly, in order to minimize such a problem, a condenser lens for condensing the light emitted from the LED has been developed as shown in Fig.

FIG. 1 is a cross-sectional view of a light-converging lens according to the related art. As shown in FIG. 1, the conventional condensing lens 10 is disposed on the side where the light of the LED 2 is emitted.

The entire body 11 of the condenser lens 10 is formed of a material such as transparent glass, and the upper surface of the condenser lens 10 is formed of an aspherical lens surface 12 having an upward convex curved surface.

The light of the LED 2 emitted 180 degrees by the condenser lens 10 of the aspherical lens thus formed is transmitted through the flat bottom surface of the condenser lens 10 to be incident on the aspherical surface 12 of the upper surface It is collected and scanned in a square.

However, in the conventional condenser lens 10 constructed as described above, the condensing efficiency is somewhat improved near the optical axis 4 by the aspheric lens surface 12. However, such condensing efficiency is limited only to the vicinity of the optical axis 4, The light is refracted and diffused in the outward direction away from the optical axis 4 at the edge portions of the light converging lens 4 and the far converging lens 10, which has a problem in locally illuminating the far distance.

Patent Registration No. 10-0756174 discloses a condensing lens that collects all the light emitted from the LED so as to have a directivity parallel to the optical axis, thereby reducing the loss of light emitted from the LED and efficiently transmitting the local region A first lens part 20 made of a transparent body 11 'so as to be illuminated and having a convex aspheric lens at the center of the body 11', and a second lens part 20 'surrounding the rim of the first lens part 20' And a second lens unit (30).

The first lens unit 20 has first and second aspherical lens surfaces 21 and 22 which are convex on the symmetrical surfaces, that is, upper and lower surfaces, and the second lens unit 30 has convex surfaces, An incident surface 31 protruding from the outer periphery of the first aspherical lens surface 22 and inserted with the LED 2 and refracted by the light emitted from the LED 2; A reflecting surface 32 extending obliquely to an elliptic curved surface gradually becoming wider toward the second aspherical lens surface 22 so as to totally reflect light from the LED 2 and a second aspherical lens surface And an exit surface 33 extending obliquely to the curved surface concave toward the optical axis 4 and deflecting the light of the totally reflected LED 2 into light parallel to the optical axis 4 and emitting the light.

However, the condensing lens 10 'according to the related art has a configuration in which the light L1 passing through the first and second aspherical lens surfaces 21 and 22 and the light L1 passing through the reflecting surface 32 toward the second aspherical lens surface 22 The total reflection light L2 is refracted by the light parallel to the optical axis and emitted, but the light L3, which is not totally reflected by the reflection surface 32 and is emitted to the side, is not condensed, .

Korean Patent Registration No. 10-0756174

In order to solve these problems, it is an object of the present invention to provide an illumination lens module that reflects light emitted to a side by using a lens and a reflection member, thereby improving light collection efficiency.

According to an aspect of the present invention, there is provided an illumination lens module including: a first lens portion having a convex aspheric lens surface formed on an upper surface and a lower surface and having a radius of curvature different from that of the first lens portion; A reflecting surface for allowing a part of the light incident on the incident surface to be totally reflected, and an exit surface for refracting the light totally reflected from the reflecting surface by the light parallel to the optical axis, A second lens unit having a first lens unit and a second lens unit; And a reflector spaced a predetermined distance from the outer periphery of the lens body to reflect light emitted to the side without being totally reflected by the reflective surface of the second lens unit with light parallel to the optical axis and emit the light.

According to another aspect of the present invention, there is provided a projection optical system, comprising: a first lens unit having a first lens surface and a second lens surface; A reflection surface for allowing light incident on the incident surface to be totally reflected; And an exit surface for refracting the light totally reflected by the reflecting surface into light parallel to the optical axis and emitting the light.

In addition, the incident surface according to the present invention is formed so as to be inclined from the top to the bottom.

Further, the second lens unit according to the present invention may have a first incident surface on which an incidence surface forms an oblique inclined portion; A second incident surface on which an inclined portion having an inclination angle smaller than that of the inclined portion of the first incident surface is formed; A reflection surface for allowing light incident on the first and second incident surfaces to be totally reflected; And an exit surface for refracting the light totally reflected by the reflecting surface into light parallel to the optical axis and emitting the light.

Further, the second lens unit according to the present invention may have a first incident surface on which an incidence surface forms an oblique inclined portion; A second incident surface on which an inclined portion having an inclination angle smaller than that of the inclined portion of the first incident surface is formed; A first reflecting surface for allowing light incident on the first incident surface to be totally reflected; A first emitting surface that refracts the light totally reflected by the first reflecting surface to emit light parallel to the optical axis and emits the light; A second reflecting surface formed on the lower side of the first reflecting surface so that light incident on the second incident surface is totally reflected; And a second exit surface for refracting the light totally reflected by the second reflection surface to light parallel to the optical axis and emitting the light.

The present invention has an advantage that light condensing efficiency of light can be improved by reflecting light emitted to a side by using a lens and a reflecting member.

In addition, the present invention has an advantage in that the size of the lighting apparatus can be reduced by reducing the size of the lens while improving the light condensing efficiency.

Further, the present invention is advantageous in that the angle of light can be adjusted as needed by determining the path of light by using a lens and a reflecting member.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a condensing lens according to the prior art;
2 is a cross-sectional view showing a condenser lens according to the related art;
3 is an exploded perspective view showing a first embodiment of an illumination lens module according to the present invention.
4 is a cross-sectional view of an illumination lens module according to the first embodiment of Fig. 3;
5 is an exploded perspective view showing a second embodiment of the illumination lens module according to the present invention.
6 is a cross-sectional view of an illumination lens module according to the second embodiment of Fig. 5;
7 is an exploded perspective view showing a third embodiment of the illumination lens module according to the present invention.
FIG. 8 is a cross-sectional view of an illumination lens module according to the third embodiment of FIG. 6; FIG.

Hereinafter, preferred embodiments of the illumination lens module according to the present invention will be described in detail with reference to the accompanying drawings.

(Embodiment 1)

FIG. 3 is an exploded perspective view showing a first embodiment of an illumination lens module according to the present invention, and FIG. 4 is a sectional view showing an illumination lens module according to the first embodiment of FIG.

As shown in FIGS. 3 and 4, the illumination lens module 100 according to the first embodiment includes a lens body 110 and a reflection part (not shown) so as to reflect light emitted to the side, 200).

The lens body 110 includes a first lens unit 120 and a second lens unit 130. The first lens unit 120 and the second lens unit 130 converge light output from the light source 300 and emit light parallel to the optical axis, .

The first lens unit 120 forms a first aspherical lens surface 121 and a second aspherical lens surface 122 having convex aspherical surfaces convex at different curvature radii on the upper and lower surfaces and emits light from the light source 300 For example, the first aspheric lens surface 121 has an output angle of 0 ° to 21 °, and the output angle of the first aspherical surface 121 is 0 ° to 21 °, And the second aspheric lens surface 122 has an exit angle of 0 to 3.5 degrees.

The second lens unit 130 includes an incident surface 131 formed on the outer circumference of the first lens unit 120 and incident on the light emitted from the light source 300, A reflecting surface 132 for allowing a part of light to be totally reflected and an emitting surface 133 for refracting the light totally reflected by the reflecting surface 132 with light parallel to the optical axis and emitting the light.

The incident surface 131 is formed in a sawtooth shape on the sidewall such that the light incident from the light source 300 is refracted in a direction parallel to the optical axis and is directed in a direction extending downward from an end of the first aspherical surface 121 .

The reflective surface 132 allows the light incident on the incident surface 131 to be totally reflected and refracted to the exit surface 133.

The exit surface 133 is formed so that the light totally reflected by the reflecting surface 132 is refracted and emitted as light parallel to the optical axis and has an exit angle of approximately 0.3 to 10 degrees.

The reflective portion 200 is a truncated conical member having a hollow for accommodating the lens body portion 110 therein. The reflective portion 200 can not be totally reflected by the reflective surface 132 of the second lens portion 130, So that the emitted light is reflected by the light parallel to the optical axis and emitted.

The reflective portion 200 is disposed on the outer circumference of the lens body 110 so that light reflected by the reflective portion 200 is not covered by the second lens portion 130 of the lens body 110. [ And is installed at a certain distance.

In addition, the reflector 200 may adjust the light distribution angle by providing the height of the truncated cone shape differently according to the light distribution angle.

Therefore, when light is emitted from the light source 300, the light L1 passing through the first and second aspherical lens surfaces 121 and 122 and the light L1 passing through the reflecting surface 132 are totally reflected toward the second aspherical lens surface 122 The light L3 which is refracted by the light parallel to the optical axis and emitted from the reflecting surface 200 without being totally reflected by the reflecting surface 132 is reflected by the light parallel to the optical axis in the reflecting portion 200, So that the light converging efficiency by the lens can be improved.

(Second Embodiment)

FIG. 5 is an exploded perspective view showing a second embodiment of the illumination lens module according to the present invention, and FIG. 6 is a sectional view showing the illumination lens module according to the second embodiment of FIG.

As shown in FIGS. 5 and 6, the illumination lens module 100 'according to the second embodiment includes a lens body portion 110' and a reflection portion (not shown) so as to reflect light emitted to the side and improve light- (200).

The lens body 110 'is configured to condense light output from the light source 300 and emit light parallel to the optical axis in the vertical direction. The lens body 110' includes a first lens unit 120 ', a second lens unit 130 ').

The first lens unit 120 'includes a first aspherical lens surface 121' and a second aspherical lens surface 122 'which are convex on the upper and lower surfaces and are convex at different curvature radii, , For example, the first aspheric lens surface 121 'may be in a range of 0 ° to 21 °, as long as the light emitted from the first aspherical surface 121' passes through the first and second aspherical lens surfaces 121 'and 122' And the second aspheric lens surface 122 'has an exit angle of 0 ° to 3.5 °.

The second lens unit 130 'is formed on the outer circumference of the first lens unit 120' and includes first and second incident surfaces 131'a and 131 ', through which light emitted from the light source 300 is incident, a reflection surface 132 'for allowing a part of the light incident on the first and second incident surfaces 131'a and 131'b to be totally reflected, and a reflection surface 132' for reflecting the light totally reflected from the reflection surface 132 ' And an exit surface 133 'for refracting and emitting the light parallel to the optical axis is formed.

The first incident surface 131'a has a gently curved inclined portion having an oblique incident surface so that light not incident on the first aspherical surface 121 'of the light emitted from the light source 300 is half So that the total reflection can be made on the slope 132 '.

The second incident surface 131'b is formed by forming an inclined portion of a steeply curved surface having an inclination angle smaller than that of the inclined portion of the first incident surface 131'a so that the first aspheric surface of the light emitted from the light source 300 And a part of the light not incident on the first incident surface 131'a is incident on the reflection surface 132 'so that total reflection can be performed, and the light not totally reflected from the reflection surface 132' And is emitted to the side surface of the second lens unit 130 '.

The reflective surface 132 'allows the light incident on the first and second incident surfaces 131'a and 131'b to be totally reflected and refracted to the exit surface 133'.

The exit surface 133 'is formed to refract the light totally reflected by the reflecting surface 132' into light parallel to the optical axis and emit the light, and to have an exit angle of approximately 0.3 ° to 10 °.

The reflective portion 200 is a truncated cone member having a hollow formed therein so that the lens body 110 'can be housed therein and is not totally reflected by the reflective surface 132' of the second lens portion 130 ' And the light emitted to the side surface of the second lens unit 130 'is reflected by the light parallel to the optical axis and emitted.

The reflector 200 may reflect the light reflected by the reflector 200 on the lens body 110 'so that the light reflected by the reflector 200 is not covered by the second lens unit 130' And is installed at a distance from the outer periphery.

In addition, the reflector 200 may adjust the light distribution angle by providing the height of the truncated cone shape differently according to the light distribution angle.

Accordingly, when light is emitted from the light source 300, the light L1 passing through the first and second aspherical lens surfaces 121 'and 122' and the light L1 passing through the second aspherical lens surface 122 ' And the light L3 emitted to the side without being totally reflected by the reflecting surface 132 'is reflected by the reflecting portion 200 in parallel to the optical axis Light is reflected by the light and is emitted as light parallel to the optical axis, so that the light-condensing efficiency by the lens can be improved.

(Third Embodiment)

FIG. 7 is an exploded perspective view showing a third embodiment of the illumination lens module according to the present invention, and FIG. 8 is a sectional view showing the illumination lens module according to the third embodiment of FIG.

As shown in Figs. 7 and 8, the illumination lens module 100 "according to the third embodiment includes a lens body portion 110" and a reflection portion 110 " in order to reflect light emitted to the side, (200).

The lens body 110 '' is configured to condense the light output from the light source 300 and emit light parallel to the optical axis in the vertical direction, and includes a first lens unit 120 '', a second lens unit 130 ").

The first lens unit 120 "has a first aspherical surface 121" and a second aspherical surface 122 "of convex aspherical surface convex at different curvature radii on the upper and lower surfaces, , For example, the first aspheric lens surface 121 "passes through the first and second aspherical lens surfaces 121" and 122 " And the second aspheric lens surface 122 " has an exit angle of 0 DEG to 3.5 DEG.

The second lens unit 130 "includes first and second incident surfaces 131 " and 131" a ", which are formed on the outer circumference of the first lens unit 120 & First and second reflecting surfaces 132 " and 132 "a for allowing a part of light incident on the first and second incident surfaces 131 " and 131" a to be totally reflected, The first and second exit surfaces 133 "and 133" a are formed so that the light totally reflected by the second reflecting surfaces 132 " and 132 "a is refracted and emitted as light parallel to the optical axis.

The first incident surface 131 "forms a gently curved slope having an oblique incident surface, so that light not incident on the first aspherical surface 121 " of the light emitted from the light source 300 is incident on the first So that the total reflection can be made on the reflecting surface 132 ".

The second incident surface 131 "a forms an inclined portion of a steeply curved surface having an inclination angle smaller than that of the inclined portion of the first incident surface 131 ", so that the first aspheric surface 121 & A portion of the light not incident on the first incident surface 131 " is incident on the second reflection surface 132 "a so as to be totally reflected, and the second reflection surface 132" So that the light is emitted to the side surface of the second lens unit 130 ".

The first reflecting surface 132 '' refracts the light incident on the first incident surface 131 '' to be output to the first emitting surface 133 ''.

The second reflecting surface 132 "a is formed below the first reflecting surface 132" to refract so that light incident on the second incident surface 131 "a is totally reflected to form a second emitting surface 133" a).

The first exit surface 133 "refracts the light totally reflected by the first reflecting surface 132" into light parallel to the optical axis and emits it.

The second exit surface 133 "a refracts the light totally reflected by the second reflecting surface 132" a with light parallel to the optical axis and emits it.

In the present embodiment, the second lens unit 130 "has two reflection surfaces 132 " and 132" a and two exit surfaces 133 "and 133" a. However, The slope and the emission surface may be sequentially stacked.

The reflection portion 200 is a truncated cone member having a hollow inside so that the lens body 110 '' can be received therein. The first or second reflection surface 132 '' of the second lens portion 130 ' , 132 "a, and reflects the light radiated to the side surface of the second lens unit 130 " as light parallel to the optical axis and emits the light.

The reflector 200 may reflect the light reflected by the reflector 200 on the lens body 110 '' such that the light reflected by the reflector 200 is not covered by the second lens 130 '' of the lens body 110 ' And is installed at a distance from the outer periphery.

In addition, the reflector 200 may adjust the light distribution angle by providing the height of the truncated cone shape differently according to the light distribution angle.

That is, the light reflected to the side surface of the second lens unit 130 " without being totally reflected by the first or second reflecting surface 132 ", 132 "a is reflected by the light parallel to the optical axis, So that the light distribution can be adjusted.

Accordingly, when light is emitted from the light source 300, light L1 passing through the first and second aspherical lens surfaces 121 "and 122" and light L1 passing through the second aspherical lens surface & The light L 2 totally reflected by the second reflecting surface 132 "a is refracted as the light parallel to the optical axis, and the light L2 reflected by the second reflecting surface 132" The light L4 emitted through the surface 133 "a and being emitted to the side without being totally reflected by the first or second reflecting surfaces 132", 132 "a is reflected by the reflecting portion 200 parallel to the optical axis The light condensing efficiency by the lens can be improved by improving the light condensing efficiency and the size of the lens can be reduced to reduce the size of the lighting device, By determining the path using a lens and a reflecting member, it is possible to adjust the angle of diffraction as required.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. It can be understood that

In the course of the description of the embodiments of the present invention, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, , Which may vary depending on the intention or custom of the user, the operator, and the definitions of these terms should be based on the contents throughout this specification.

100, 100 ', 100 ": illumination lens module
110, 110 ', 110 ": lens body portion
120, 120 ', 120 ": the first lens unit
121, 121 ', 121 ": a first aspherical lens surface
122, 122 ', 122 ": a second aspherical lens surface
130, 130 ', 130 ": the second lens unit
131, incident surface 132: reflecting surface
133: exit surface 131'a: first incident surface
131'b: second incident surface 132 ': reflecting surface
133 ': Outgoing surface 131'': First incident surface
132 ": first reflection surface 133 ": first emission surface
131 "a: second incident surface 132" a: second reflection surface
133 "a: second emitting surface 200:
300: Light source

Claims (5)

As an illumination lens module,
(120, 120 ', 120 ") having convex aspheric lens surfaces of different curvature radii on the upper surface and the lower surface of the first lens unit (120, 120', 120" A reflection surface formed on the periphery of the light source 300 to allow the light emitted from the light source 300 to be incident on the reflection surface and a part of the light incident on the incident surface to be totally reflected; A lens body portion (110, 110 ', 110 ") having a second lens portion (130, 130', 130") forming an exit surface for refracting and emitting light; And
The light emitted to the side without being totally reflected by the reflective surfaces of the second lens units 130, 130 ', and 130' is spaced a certain distance from the outer circumference of the lens body 110, 110 ', 110 " And a reflecting portion (200) for reflecting the light with parallel light and emitting the parallel light.
The method according to claim 1,
The second lens unit 130 includes an incidence surface 131 having a saw-tooth shape such that light incident from the light source 300 is refracted in a direction parallel to the optical axis.
A reflecting surface (132) for allowing light incident on the incident surface (131) to be totally reflected; And
And an exit surface (133) for refracting the light totally reflected by the reflecting surface (132) into light parallel to the optical axis and outputting the light.
3. The method of claim 2,
Wherein the incident surface (131) is formed to be inclined from the top to the bottom.
The method according to claim 1,
The second lens unit 130 'includes a first incident surface 131'a on which an incidence surface forms an inclined portion at an obtuse angle;
A second incident surface 131'b having an inclined portion having an inclination angle smaller than that of the inclined portion of the first incident surface 131'a;
A reflecting surface 132 'for allowing light incident on the first and second incident surfaces 131'a and 131'b to be totally reflected; And
And an exit surface (133 ') for refracting the light totally reflected by the reflecting surface (132) into light parallel to the optical axis and outputting the light.
The method according to claim 1,
The second lens unit 130 "includes a first incident surface 131" on which an incidence surface forms an obtuse inclined portion;
A second incident surface 131 "a on which an inclined portion having an inclination angle smaller than that of the inclined portion of the first incident surface 131" is formed;
A first reflecting surface 132 'for allowing light incident on the first incident surface 131' to be totally reflected;
A first exit surface 133 "for refracting the light totally reflected by the first reflecting surface 132 " to light parallel to the optical axis and emitting the light;
A second reflecting surface 132 "a formed on the lower side of the first reflecting surface 132 " so that light incident on the second incident surface 131" a is totally reflected;
And a second exit surface (133 "a) for refracting the light totally reflected by the second reflecting surface (132" a) into light parallel to the optical axis and emitting the light.

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